Table of Contents: “.... Diophantine Equations -- 8. The Theorems of Fermat, Wilson and Euler -- IV. Cryptography and Divisors -- 9. Euler Trap Doors and Public-Key Encryption -- 10. The Divisor Functions -- 11. The Prime Divisor Functions -- 12. Certified Signatures -- 13. Primitive Roots...”

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Table of Contents: “..., Wilson and Euler -- Cryptography and Divisors -- Euler Trap Doors and Public-Key Encryption -- The Divisor Functions -- The Prime Divisor Functions -- Certified Signatures -- Primitive Roots -- Knapsack Encryption -- Residues and Diffraction -- Quadratic...”

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